Add a link to migrating docs to home #4483

Job	Run time
check-git-rev-deps	33s
cargo-deny (advisories)	49s
cargo-deny (bans licenses sources)	45s
fmt	19s
build-and-test (msrv, ubuntu-latest, x86_64-unknown-linux-gnu)	9m 3s
semver-checks	5m 56s
build-and-test (msrv, ubuntu-latest, aarch64-unknown-linux-gnu, true)	5m 11s
build-fuzz	2m 59s
build-and-test (msrv, windows-latest, x86_64-pc-windows-msvc)	18m 5s
build-and-test (latest, ubuntu-latest, x86_64-unknown-linux-gnu)	7m 46s
docs	5m 20s
build-and-test (latest, ubuntu-latest, aarch64-unknown-linux-gnu, true)	4m 54s
migration-docs	33s
build-and-test (latest, windows-latest, x86_64-pc-windows-msvc)	19m 7s
publish-dry-run	0s
readme	2m 44s
complete	1s
	1h 24m 5s

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